Shield and attachment for trimmer belts



Jan. 6. 1925. 2 1,522,263

. E. F. PARKS, JR., ET AL SHIELD AND ATTACHMENT FOR TRIMMER BELTS FiledJan. 4/1922 Patented Jan. 6, 1925.

warren s ra 1 r at B NT.- 1o FIEYEQQGEQLQ ELISHA F. PARKS-j JR., ANDPHILIP G. LANG, JR., 0F BALTIMORE, "MARYLAND/ SHIELD AND ATTACHMENT FORTRIMMELR, BELTS.

Application filed January- 4, 1922. Serial No. 527,042. T

To all whom it may concern.

Be it known that we, ELISHA F. PARKS,

Jr., and PHILIP G. LANG, J12, citizens of the United States, residing,respectively, at Baltimore County and Baltimore c1ty,'1n the State ofMaryland, have invented certain new and useful Improvements in Shieldsand Attachments for Trimmer Belts; and we do 1 hereby declare. thefollowing to be a full,

clear, and exact description of the invent1on,'such as will enableothers skllled 111 the art to which it appertains to make and use thesame.

Our invention relates to shields and attachments for trimmer belts suchas are used in storing cargoes of coal or other materials on boardships, or in placing said materials in bins or other storagereceptacles.

Among the objects of our invention are To produce a shield which can bereadily secured to any approved form of belt.-

To produce a shield which can be blanked and shaped readily by means ofdies so that? the same can be furnished at a reasonable Heretofore, avariety of attachments have been secured to trimmer belts, but the beltswhere subject to considerable wear due to the impact of the material tobe trimmed. This we obviate with our improved shield, and while saidshield is primarily intended for use with our improved attachment shownin our co-pending application for U. S. Letters Patent S. N. 409,507,filed September 10, 1920, yet it is capable of use with any form ofattachment, or capable of use without any attachment. The re-enforcingelement of our improved shield may also be used to reinforce the beltwhere the attachment is joined thereto.

One form of our shield and reinforcement is shown in the accompanyingdrawings, in

Figure-1 is a plan view of abelt equipped with our improved shield,reinforcement andattachment I Fig. 21s ELVlGW of the parts shown in Figi1 looking in the direction of the arrow 2 in said figure.

Fig. 3 is a view of the parts shown in Fig. 2-looking 3 in said figure.

F ig: 1 is a plan view of oneof the 18-811-' forcements.

Figs-5 and -6 are end views respectively of in the directionof thearrow---- R our improved shield and attachment, the

teeth not being bent over.

In the drawings 5 IS a belt which may be of leather or any approvedmaterial, of any suitable width,"

driven 1n any approved mannerv and controlled by any suitable mechanismso. thatit .will be dlrected against the material thatis to be trimmed.

The" attachment shown at 6 is'illustrated, described and claimed in'our.co-pending applications for U. S. Letters Patent above noted exceptingas regards certain difterl-i encesj to which reference Wlll behereinafter made.

Each of our improved shields consists of a plate 7 having upon each enda plurality of teeth 8 bent at right angles thereto.

It is to be noted that the teeth 88 on the ends of each shield are instaggered relation to each other as illustrated by the teeth 9 and 10 inFig. 1.

There are similar teeth 1111 formed in staggered relation upon the endsof the attachment 6, two of which are shown dotted at 12 and 13 in Fig.1.

The staggered relation between the teeth at the ends of the attachment 6shown herein is the feature wherein said attachment differs from theattachment shown in our copending application for U. S. Letters Patentabove noted.

In order to distribute the stress when one of the attachments 6 or theplate 7 is subjected to an undue force, we provide the reenforcement 14which consists of a fiat plate having a plurality of rectangular holessuch as 15, each hole being for thereception of one of the teeth 8 or11.

In applying the attachment 6 and plate 7 vent the edges such as 18 ofthe attachment 6 from cutting into the belt. They also serve to preventthe ends such as 19 of the plate 7 from cutting into the belt.

It is to be noted that by reason of the fact that the teeth 9 and 10 arein staggered relation to each other and that the teeth 12 and 13 arealso in staggered relation to each other, and that the teeth 10 and 12are in staggered relation to each other when an attachment 6 and plate 7are assembled upon the belt with their edges in line, it follows thatthe bent over portions 16 and 17 are also in staggered relation to eachother.

The parts are so constructed that the bent over portions 16 and 17 arein staggered relation in order to increase the coeflicient of frictionof the belt with the driving pulley when the bent over portions 16 and17 are passing around same. It is obvious that if the bent over portion16 were opposite the bent over portion 17, they would becircumferentially in line upon the pulley and the interstitial beltmaterial would not come into contact with the pulley. By placing theportions 16 and 17 in staggered relation, the belt material is incircumferential alignment with said portions and the coefiiciency offriction of the belt with the pulley is increased.

The attachment 6 is for the purpose of positively driving the materialto be trimmed. The shields comprising the plate 7 serve to prevent theabrasion of the surface of the belt 5. The re-enforcements 14 distributestresses from any attachment or shield throughout the width of the beltand thus prevent an undue strain at any one part. The centre of the topof 6 is in contact with the belt to support the ends. 7

By these means, we provide a trimmer belt capable of performingeffective work and having maximum wearing qualities.

While we have shown one form of our improved attachment, shield andre-enforcement, we do not desire to be limited to the exact constructionshown in the drawings, for many changes may be made therein withoutdeparting from the spirit of our inven tion.

W'e claim 1. The combination with a belt, and an attachment and a shieldmounted end to end on said belt, of teeth projecting from the ends ofsaid attachment and shield through said belt and lying adjacent theunderside thereof, the teeth on the abutting ends of said attachment andsaid shield being in staggered relation with each other and oppositelydisposed.

2. The combination with a belt and shields mounted end to end thereon,of teeth projecting from the ends of said shields through said belt andlying adjacent the underside thereof, the teeth on the abutting ends ofsaid shields being in staggered relation with each other oppositelydisposed.

In testimony whereof, we affix our signa tures.

ELIsI-IA F. PARKS, JR. PHILIP e. LANG, JR.

